What does "let's take the subway" mean in English for Spanish?

In English for Spanish, "let's take the subway" means:

tomemos el metro

Listen to "let's take the subway": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 2, Scene 5